It's neat but a bit £££££££. It would make lubeing/removing the rear wheel easy. It could be made up quite easy for a lot less $$$$$$$.
http://www.ebay.co.uk/itm/251269422983?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649
Having just watched the vidio, maybe it is worth the wedge !